

| Acronym | Sense | Language | Topics | 
|---|---|---|---|
| ICD | Institute for Cultural Diplomacy | In English | → Organizations and associations → International relations → Civilization, culture, progress | 
| ICD-O | International Classification of Diseases for Oncology | In English | → Bibliography → Oncology | 
| ICDA | Integrated Cached Disk Array | In English | → Computer hardware | 
| ICDAA | International Criminal Defence Attorneys Association (www.aiad-icdaa.org) = AIAD | Association Internationale des Avocats de la Défense | In French | In English | → Associations → Criminal law | 
| ICDAR | International Conference on Document Analysis and Recognition | In English | → Congresses → Document processing | 
| ICDR | Incremental Critical Design Review | In English | |
| ICDS | Interface Control Document Schedule | In English | → Quality management → Human-computer interaction | 
| ICDU | Inertial Coupling Data Unit | In English | |
| ICE | Ideal Cabin Environment | In English | → Aeronautics, aircraft | 
| ICE | Input Control Element | In English | |
| ICE | Instrument Checkout Equipment | In English | |
| ICE | Istituto nazionale per il Commercio Estero | In Italian | → Trade | 
| ICE | Intercity Express | In English | → Rail transport engineering → Transport and postal services | 
| ICE | In Case of Emergency | In English | → Telecommunications → Traumatology | 
| ICE | Installation Centrale d'Entrepôt | In French | → Maintenance and logistics | 
| ICEAPS | International Centre of Excellence in Asia Pacific Studies | In English | → Area studies | 
| ICEBE | International Conference on e-Business Engineering | In English | → Congresses → Trade | 
| ICEDD | Institut de Conseil et d'Études en Développement Durable | In French | |
| ICEI | Istituto Cooperazione Economica Internazionale | In Italian | → Organizations and associations → International economic cooperation | 
| ICEIS | International Conference on Enterprise Information Systems | In English | → Congresses → Knowledge management → Data | 
| ICEM | Institut Coopératif de l'École Moderne | In French | → Education | 
| ICEM | Institut Català d'Estudis Mediterranis | In Spanish | → Area studies | 
| ICEM | Intergovernmental Committee for European Migration | In English | → International relations → Migrations | 
| ICES | International Centre for Ethnic Studies | In English | → Ethnology | 
| ICES | International Council for Exploration of the Sea | In French | → Organizations and associations → Earth sciences → Zoology | 
| ICES | International Council for the Exploration of the Seas (www.ices.inst.dk) | In English | → Organizations and associations → Marine research, oceanography | 
| ICESCR | International Covenant on Economic, Social and Cultural Rights | In English | → International law → Fundamental rights | 
| ICESR | International Covenant on Economic, Social and Cultural Rights | In English | → International law → Fundamental rights | 
| ICF | International Canoe Federation (https://www.canoeicf.com/) | In English | → Organizations and associations → Sport, physical exercises | 
| ICF | International Christian Fellowship | In English | → Organizations and associations → Christianity | 
| ICF | International Coach Federation (http://https://coachfederation.org/) | In English | → Organizations and associations → 659 | 
| ICF | Interface Control Function | In English | → Human-computer interaction | 
| ICF | Institutul de Chimie Fizică (www.icf.ro) | In Romanian | → Research institutes → Chemistry | 
| ICF | Intracellular fluid | In English | → Cytology → Physiology | 
| ICF | Insulating Concrete Form | In English | → Construction → Materials science | 
| ICFE | Indemnité Compensatrice de Frais d'Études | In French | |
| ICFR | Inspection Comptable et Financière Régionale | In French | → Accounting → Finance | 
| ICFS | Indemnité Compensatoire de Frais Spéciaux | In French | → Finance → Labour, labour economics → Electrical engineering | 
| ICFS | International Certified Future Strategist (www.certifiedfuturestrategist.com) | In English | → Education → Labour, labour economics → Economics | 
| ICFTU | International Confederation of Free Trade Unions (www.icftu.org) = CISL | Confédération Internationale des Syndicats Libres | In French = CIOSL | Confederación Internacional de Organizaciones Sindicales Libres | In Spanish = CIOSL | Confederação Internacional de Organizações Sindicais Livres | In Portuguese = ICB | International Criminal Bar | In English = BPI | Barreau Pénal International | In French | In English | → Organizations and associations → Labour, labour economics | 
| ICG | Institute for Career Guidance | In English | → Labour, labour economics | 
| ICG | In-Flight Coverall Garment | In English | → Aeronautics, aircraft → Astronautics | 
| ICG | Inter-universitair Centrum voor Geo-ecologisch Onderzoek (www.science.uva.nl/ibed/icg/) | In Dutch | → Research institutes → Higher education, universities → Ecology → Earth sciences | 
| ICG | International Crisis Group (www.crisisgroup.org) | In English | → Organizations and associations → Polemology | 
| ICG | Institut Charles Gerhardt (www.icgm.fr) | In French | → Research institutes → Chemistry | 
| ICG | Intérêts Communaux Gesvois | In French | → Political parties and movements | 
| ICG | International Committee on GNSS (Global Navigation Satellite Systems) | In English | → Organizations and associations → Astronautics | 
| ICG | Intermediate Capital Group (www.icgplc.com) | In English | → Finance | 
| ICG | International Cinematographers Guild (www.cameraguild.com) | In English | → Organizations and associations → Cinema, movies | 
| ICG | International College for Girls | In English | → Education | 
| ICG | International Communications Group (www.icg.aero) | In English | → Telecommunications → Astronautics | 
| ICG | Institute for Computer Graphics and Vision | In English | → Research institutes → Computer-based techniques | 
| ICG | Information Content Management Group | In English | → United Nations → International economic cooperation | 
| ICGA | IEEE (Institute of Electrical and Electronics Engineers) Computer Graphics Applications | In English | → Serial publications, periodicals → Graphical processing | 
| ICH | International Conference on Harmonisation of Technical Requirements for Registration of Pharmaceuticals for Human Use | In English | → Pharmacology, toxicology → Veterinary medicine | 
| ICH | Interkultura Centro Herzberg | In Esperanto | → Civilization, culture, progress | 
| ICHA | Integrated Cargo Hazard Assessment | In English | |
| ICHMT | International Communications in Heat and Mass Transfer | In English | → Serial publications, periodicals → Thermodynamics | 
| ICHO | Iran Cultural Heritage Organisation | In English | → Organizations and associations → Civilization, culture, progress | 
| ICHR | Indian Council of Historical Research (www.ichrindia.org) | In English | → Organizations and associations → History → Research policy → India | 
| ICHRDD | International Centre for Human Rights and Democratic Development (www.ichrdd.ca) = CIDPDD | Centre International des Droits de la Personne et du Développement Démocratique | In French | In English | → Organizations and associations → Fundamental rights → Democracy → Canada | 
| ICHRP | International Council on Human Rights Policy | In English | → Organizations and associations → Human rights → Fundamental rights | 
| ICHRPI | International Commission for the History of Representative and Parliamentary Institutions | In English | → Parliaments, representation → History | 
| ICHSEA | International Conference on the History of Science in East Asia | In English | → Congresses → Mathematics and natural sciences → History | 
| ICI | Institutul Naţional de Cercetare-Dezvoltare în Informatică | In Romanian | → Computer science | 
| ICI | Interim Configuration Inspection | In English | |
| ICI | Information, Coordination, Incitation | In French | → Computer science | 
| ICI | Instrument de Coopération avec les pays Industrialisés | In French | → European Union | 
| ICIA | Institutul de Cercetări pentru Inteligenţă Artificială (www.racai.ro) | In Romanian | → Research institutes → Artificial intelligence | 
| ICIAM | International Council for Industrial and Applied Mathematics | In English | → Mathematics | 
| ICID | International Commission on Irrigation and Drainage | In English | → Organizations and associations → Agricultural sciences → Environmental technology, water supply, waste management | 
| ICID | International Commission for Irrigation and Drainage = CIID | Commission Internationale pour les Irrigations et le Drainage | In French | In English | → Organizations and associations → 627 → Agricultural sciences | 
| ICIE | Institute for Communications and Information Engineering | In English | → Telecommunications → Computer science | 
| ICIEC | Islamic Corporation for the Insurance of Investment & Export Credit | In English | → Banks → International economic cooperation | 
| ICIM | Institutul Naţional de Cercetare-Dezvoltare pentru Protecţia Mediului | In Romanian | |
| ICIS | Institute for Comparative and International Studies | In English | → International relations | 
| ICiSM | IEEE (Institute of Electrical and Electronics Engineers) Circuits Systems Magazine | In English | → Serial publications, periodicals → Electronics | 
| ICISS | International Commission on Intervention and State Sovereignty (www.iciss-ciise.gc.ca) = CONAP | Confederación de Nacionalidades Amazónicas del Perú | In Spanish = CONAP | Confederation of Amazonian Nationalities of Peru | In English = CONAP | Confédération des Nationalités Amazoniennes du Pérou | In French = CONAP | Confederação das Nações Amazônicas do Peru | In Portuguese = CIISE | Commission Internationale de l'Intervention et de la Souveraineté des États | In French | In English | → International relations → United Nations → Canada | 
| ICJ | Institutul de Cercetari Juridice | In Romanian | → Law, jurisprudence | 
| ICJ | International Court of Justice (www.icj-cij.org) = CIJ | Cour Internationale de Justice | In French = CIJ | Corte Internacional de Justicia | In Spanish = CIJ | Corte Internacional de Justiça | In Portuguese = CIJ | Cort Internacional de Justícia | In Catalan = MSD | Mezinárodní soudní dvůr | In Czech = IGH | Internationaler Gerichtshof | In German = ΔΔΔ | Διεθνές Δικαστήριο της Δικαιοσύνης | In Greek = IK | Internacia Kortumo | In Esperanto = ICJ | 국제사법재판소 | In Korean = TTT | Tarptautinis Teisingumo Teismas | In Lithuanian = MTS | Międzynarodowy Trybunał Sprawiedliwości | In Polish = MSD | Medzinárodný súdny dvor | In Slovak = МСП | Међународни суд правде | In Serbian = MSP | Međunarodni sud pravde | In Serbo-Croatian | In English | → International relations → Law, jurisprudence | 
| ICJ | 국제사법재판소 (www.icj-cij.org) = CIJ, MSD, IGH, ΔΔΔ, IK, TTT, MTS, МСП, MSP (look above) | In Korean | → International relations → Law, jurisprudence | 
| ICJ | International Criminal Justice = JPI | Justice Pénale Internationale | In French | In English | → International law | 
| ICL | Interface Control Layout | In English | → Human-computer interaction | 
| ICL | Imperial College London (https://www.imperial.ac.uk) | In English | → Higher education, universities → United Kingdom | 
| ICL | International Criminal Law = DPI | Droit Pénal International | In French | In English | → Criminal law → International law | 
| ICLARM | International Centre for Living Aquatic Resources Management | In English | → Fishing, hunting | 
| ICLC | Interlab Cell Line Collection (www.iclc.it) | In English | → Cytology → Biotechnology → Italia | 
| ICLD | Interlab Cell Line Database | In English | → Cytology → Biotechnology | 
| ICLEF | Interactive Cross-Language Evaluation Forum | In English | → Computer-based techniques → Linguistics | 
| ICLP | Institute of Chinese Literature and Philosophy | In English | → Research institutes → Philosophy, psychology → Literature → China | 
| ICM | Inner Cell Mass | In English | → Biological sciences | 
| ICM | Instrumentation and Communication Monitor | In English | |
| ICM | Integrated Cost Module | In English | → Prices | 
| ICM | Intergovernmental Committee for Migration | In English | → International relations → Migrations | 
| ICMAB | Instituto de Ciencia de Materiales de Barcelona (www.icmab.es) | In Spanish | → Research institutes → Materials science → Spain | 
| ICME | Institute of Cast Metals Engineers | In English | → Metallurgy | 
| ICMI | International Commission on Mathematical Instruction (www.mathunion.org/ICMI/) | In English | → Organizations and associations → Mathematics → Education | 
| ICMI | International Customer Management Institute (www.incoming.com) | In English | → Management | 
| ICMI | International Conference on Multimodal Interfaces | In English | → Congresses → Human-computer interaction | 
| ICMI | Inductive Components Manufacturing Inc. (www.icmiinc.com) | In English | → Electrical engineering | 
| ICMJE | International Committee of Medical Journal Editors (www.icmje.org) | In English | → Serial publications, periodicals → Medicine | 
| ICMP | Internet Control Message Protocol | In English | → Internet | 
| ICMPP | Institutul de Chimie Macromoleculara | In Romanian | → Chemistry | 
| ICMR | Indian Council for Medical Research (www.icmr.nic.in) | In English | → Organizations and associations → Medicine → Research policy → India | 
| ICMS | Indirect Cost Management System | In English | → Prices | 
| ICMS | Information, Communication, Modélisation et Simulation (www.polytechnicum.org/icms/) | In French | → Higher education, universities → Computer-based techniques | 
| ICMS | Ingénierie et Contrôle des Matériaux et des Structures | In French | → Materials science → Mechanical engineering | 
| ICMS | International College of Management Sydney | In English | → Specialized or polytechnical colleges → Computer science | 
| ICMS | International Committee on Museum Security | In English | → Museums | 
| ICMT | Intercontract Material Transfer | In English | |
| ICN | Inspectorate of Civil Navigation | In English | → Public administration, government → Transport and postal services | 
| ICN | Intercomputer Network | In English | → Networks, communication | 
| ICN | Interface Change Notice | In English | |
| ICN | International Conference on Nutrition = CIN | Conferencia Internacional sobre Nutrición | In Spanish = CIN | Conférence Internationale sur la Nutrition | In French = CIN | Conferência Internacional sobre Nutrição | In Portuguese | In English | → Congresses → Nutrition | 
| ICN | Integrated Computing Network | In English | → Software | 
| ICNEM | Internacia Centro de la Neŭtrala Esperanto-Movado | In Esperanto | → Organizations and associations → Artificial languages (linguistics) | 
| ICO | Integrated Checkout | In English | |
| ICO | Integrated-Communication Officer | In English | |
| ICO | Interuniversitair Centrum voor Onderwijskundig Onderzoek | In Dutch | → Research institutes → Higher education, universities → Education | 
| ICOC | Indonesia Council Open Conference | In English | → Organizations and associations | 
| ICOLD | International Commission on Large Dams (www.icold-cigb.org) | In English | → Organizations and associations → 627 | 
| IComM | IEEE (Institute of Electrical and Electronics Engineers) Communications Magazine | In English | → Serial publications, periodicals → Networks, communication → Telecommunications | 
| ICOMP | Institute for Computational Mechanics in Propulsion | In English | → Research institutes → Mechanical engineering → Computer simulation → Vehicle engineering | 
| ICOMTEC | Institut de Communication et des Nouvelles Technologies (http://icomtec.univ-poitiers.fr) | In French | → Higher education, universities → Research institutes → Computer science → Telecommunications → France | 
| ICONTEC | Instituto Colombiano de Normas Técnicas y Certificación (www.icontec.org.co) | In Spanish | → Standardization | 
| ICOPHIL | International Conference on Philippine Studies | In English | → Congresses → Area studies | 
| ICORD | International Collaboration on Repair Discoveries | In English | → Organizations and associations → Neurology → Traumatology | 
| ICORSMI | Interagency Committee on Ocean Science and Resource Management Integration | In English | → Marine research, oceanography | 
| ICOS | Integrated Cavity Output Spectroscopy | In English | → Analytical chemistry | 
| ICOS | Integrated Casino Operating System | In English | |
| ICOS | Integrated Coastal Observation System | In English | |
| ICOS | Integrated Compact Oil Seal | In English | |
| ICOS | Integrated Communications Organizing Standard | In English | → Standardization → Telecommunications | 
| ICOS | Integrated Court Operations System | In English | |
| ICOS | Integrated Cargo Operating Software | In English | → Software → Transport and postal services | 
| ICOS | Inducible Costimulator | In English | → Biological sciences | 
| ICOTT | International Congress of Official Tourist Traffic Associations | In English | → Organizations and associations → Tourism | 
| ICOUR | Irrigation Company for the Upper Regions | In English | → 627 → Agricultural sciences | 
| ICP | Instituto de Catálisis y Petroleoquímica | In Spanish | → Chemical technology → 665 | 
| ICP | Iterative Closest Point | In English | |
| ICP | International Comparison Program | In English | → Economics | 
| ICP | ICS Control Program | In English | |
| ICP | Indicator Control Panel | In English | |
| ICP | Interface Change Proposal | In English | → Networks, communication | 
| ICP | Interface Control Panel | In English | → Networks, communication | 
| ICP | Inventory Control Point | In English | → Maintenance and logistics | 
| ICP | International Center of Photography | In English | → Photography | 
| ICP | Institut Catholique de Paris (www.icp.fr) | In French | → Education → Roman catholic church → France | 
| ICP | Insane Clown Posse | In English | → Music | 
| ICP | Instituto Cristão de Pesquisas | In Portuguese | → Christianity | 
| ICP | Intracranial pressure | In English | → Physiology → Neurology | 
| ICP | Institut de la Communication Parlée | In French | → Language, linguistics, literature | 
| ICP | Inductively Coupled Plasma | In English | → Plasma physics | 
| ICP-MS | Inductively Coupled Plasma Mass Spectrometry | In English | → Plasma physics → Chromatography, mass spectrography | 
| ICPDR | International Commission for the Protection of the Danube River | In English | → Organizations and associations → 5023 → 627 | 
| ICPE | Installation Classée pour la Protection de l'Environnement | In French | → Environmental protection | 
| ICPE | Installations Classées pour la Protection de l'Environement | In French | → Threats to the environment | 
| ICPEN | International Consumer Protection and Enforcement Network | In English | |
| ICPO | Irrevocable Commission Payment Order | In English | → Trade | 
| ICPO | Institute of Cytology and Preventive Oncology | In English | → Research institutes → Cytology → Oncology | 
| ICPO | International Criminal Police Organization | In English | → Organizations and associations → Criminology → Police | 
| ICPO | Irrevocable Corporate Purchase Order | In English | → Trade → 34775 | 
| ICPR | Indian Council of Philosophical Research (www.icpr.in) | In English | → Organizations and associations → Philosophy, psychology → Research policy → India | 
| ICPS | International Conference on the Physics of Semiconductors | In English | → Congresses → Electricity, magnetism, electromagnetism → 539 → Electrical engineering | 
| ICR | Inductance, Capacitance, and Resistance | In English | → Physics → Electrical engineering | 
| ICR | Instruction Change Request | In English | |
| ICR | Interface Compatibility Record | In English | → Networks, communication | 
| ICR | Intelligent Character Recognition | In English | → Writing systems → Computer-based techniques | 
| ICR | Indirect Cost Recovery | In English | → Prices | 
| ICRA | Internet Content Rating Association | In English | → Associations → Internet | 
| ICRA | International Conference on Robotics and Automation | In English | |
| ICRA | Association de Classification du Contenu de l'Internet | In French | → Internet → Libraries → Associations | 
| ICRAT | International Conference on Research in Air Transportation | In English | → Congresses → Transport and postal services | 
| ICRB | Interface Change Review Board | In English | → Networks, communication | 
| ICRC | International Committee of the Red Cross (www.icrc.org) = CICR | Comité Internacional de la Cruz Roja | In Spanish = CICR | Comité International de la Croix-Rouge | In French = CICV | Comitê Internacional da Cruz Vermelha | In Portuguese = МККК | Международный комитет Красного Креста | In Russian = SSKK | Starptautiskā Sarkanā Krusta Komiteja | In Latvian = CICR | Comitato Internazionale della Croce Rossa | In Italian = ICRC | 적십자 국제 위원회 | In Korean = CICR | Comitè Internacional de la Creu Roja | In Catalan = CICR | Comitât entèrnacionâl de la Crouèx-Roge | In Franco-Provençal | In English | → Organizations and associations → Medicine | 
| ICRC | 적십자 국제 위원회 (www.icrc.org) = CICR, CICV, МККК, SSKK (look above) | In Korean | → Organizations and associations → Medicine | 
| ICRISAT | International Crops Research Institute for the Semi-Arid Tropics (www.icrisat.org) | In English | → Research institutes → Organizations and associations → Agricultural sciences | 
| ICRP | International Commission on Radiological Protection | In English | → Nuclear technology | 
| ICRP | International Council on Radiation Protection | In English | → International relations | 
| ICRP | Institut de Communication et Relations Publiques | In French | → Specialized or polytechnical colleges → Public relations | 
| ICRU | International Commission on Radiation Units and Measurements = CIUMR | Comisión Internacional de Unidades y Medidas Radiológicas | In Spanish = CIUMR | Commission Internationale des Unités et des Mesures de Radiation | In French = CIUMR | Comissão Internacional de Unidades e Medidas Radiação | In Portuguese | In English | → Standardization → Nuclear technology | 
| ICS | India China School | In English | → Education → China | 
| ICS | International Classification for Standards | In English | → Standardization | 
| ICS | Instrumentation Control System | In English | |
| ICS | Intercommunication System | In English | → Networks, communication → Telecommunications | 
| ICS | Interface Control Specification | In English | → Human-computer interaction | 
| ICS | Interphone Control Station | In English | → Telecommunications | 
| ICS | Interpretive Computer Simulator | In English | → Computer simulation | 
| ICS | Intelligent Control Systems | In English | → Engineering, technology | 
| ICS | International Commission on Stratigraphy | In English | → Organizations and associations → 5517 | 
| ICS | International Child Support | In English | → Organizations and associations | 
| ICS | Institut Clinique de la Souris (www-mci.u-strasbg.fr) | In French | → Research institutes → Medicine → Pharmacology, toxicology → France | 
| ICS | Internet Connection Sharing | In English | → Internet → Software | 
| ICS | Ingénierie des Contenus et Savoirs (http://scenari.utc.fr) | In French | → Research institutes → Computer science → Knowledge management → France | 
| ICS | Initiative Clause Sociale (www.ics-asso.org) | In French | → Organizations and associations → Economics → Labour, labour economics | 
| ICS | Institut Charles Sadron (www-ics.u-strasbg.fr) | In French | → Research institutes → Physics → Chemistry → France | 
| ICS | Institut de Cinématographie Scientifique (www.ics.cnrs-bellevue.fr) | In French | → Research institutes → Cinema, movies → France | 
| ICS | Industries Chimiques du Sénégal (www.ics.sn) | In French | → Chemical technology | 
| ICS | International Continence Society (www.icsoffice.org) | In English | → Organizations and associations → Urology | 
| ICS | Incident Command System | In English | → Management |